首页|Reconstruction of water level variations during the last 4K years BP using magnetic and biological sedimentary proxies from Lake Fonck (northern Patagonia, Argentina)
Reconstruction of water level variations during the last 4K years BP using magnetic and biological sedimentary proxies from Lake Fonck (northern Patagonia, Argentina)
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NETL
NSTL
Elsevier
Lakes have changed throughout history due to natural climatic variations and human impact. Lake Fonck is a lake of glacial origin located in northern Patagonia, Argentina, which has probably been also affected by these changes. A 160 cm sediment core from Lake Fonck covering the last 4000 years was analysed using a multiproxy approach. Magnetic measurements were conducted to determine the mineralogical composition, concentration and magnetic grain size to model water level variations in the lake and chironomid head capsules and organic matter were also analysed to provide additional and complementary information on productivity and environmental conditions. Although lake water levels and the chironomid assemblage varied over the entire period analysed, it was observed that the lake experienced the greatest environmental stress during the last 200 years. This period records the most acute droughts and floods of the last 4000 years, possibly related to human intervention in these ecosystems. This is the first study to combine environmental magnetic studies with biological (chironomid) analysis demonstrating the effectiveness of integrating multiple indicators of different sensitivities for climatic and environmental reconstructions.
Lake sedimentsChironomidsMultiproxyPaleoenvironmental magnetismLate HoloceneEL-TREBOL PATAGONIAHOLOCENE-PLEISTOCENE SEDIMENTSRELATIVE PALEOINTENSITYGEOMAGNETIC-FIELDSHALLOW LAKESKYR BPCHIRONOMIDSPARAMETERSESCONDIDORECORDS
Petruzzella, F.、Irurzun, M. A.、Massaferro, J.、Gogorza, C.
NETL
NSTL
Elsevier
